<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div :class="themeClass">
            <!-- header -->
            <header>
                <i class="icon-menu"></i>
                <span>珠峰培训</span>
                <i class="icon-more"></i>
            </header>
            <!-- banner -->
            <nav>
                <ul>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                </ul>
            </nav>

            <!-- main -->
            <!-- select  v-model  代表value对应的内容值 -->
            <div class="sel-box">
                <select v-model="theme">
                    <option class="cell" value="default">点击</option>
                    <option class="cell" value="red">red</option>
                    <option class="cell" value="green">green</option>
                    <option class="cell" value="purple">purple</option>
                    <option class="cell" value="orange">orange</option>
                </select>
            </div>

            <!-- footer -->
        </div>
    </div>

</body>

</html>